I have an 04 F-150 supercrew shortbed with 20" wheels and tires. I just bought a camper and the thing is a real dog [:@]with that 5.4L engine. It currently has a Diablo computer programer, and a cold air intake. I need to get more power/torque to tow this camper, it also has air bags on the rear.

Any idea's? Gears or Super Charger or something else

 

Gears would help. Best bang for the buck.